package com.example.sunmiv1.utils;

import android.content.Context;
import android.content.pm.PackageInfo;
import android.content.pm.PackageManager;
import android.os.Build;
import android.os.Environment;
import android.os.Looper;
import android.util.Log;
import android.widget.Toast;

import com.example.sunmiv1.service.BugService;
import com.example.sunmiv1.utils.net.ACache;

import java.io.BufferedReader;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.PrintWriter;
import java.io.StringWriter;
import java.io.Writer;
import java.lang.reflect.Field;
import java.text.DateFormat;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.HashMap;
import java.util.Map;

/**
 * Created by Administrator on 2018-07-30.
 */

public class CrashHandler implements Thread.UncaughtExceptionHandler {

    public static final String TAG = "CrashHandler";
    //系統默認的UncaughtException處理類
    private Thread.UncaughtExceptionHandler mDefaultHandler;
    //CrashHandler實例

    private static CrashHandler instance;
    //程序的Context對象

    private Context mContext;

    private ACache aCache;

    //用來存儲設備信息和異常信息

    private Map<String, String> infos = new HashMap<String, String>();

    //用於格式化日期,作爲日誌文件名的一部分

    private DateFormat formatter = new SimpleDateFormat("yyyy-MM-dd-HH-mm-ss");

    /**
     * 保證只有一個CrashHandler實例
     */
    private CrashHandler() {
    }

    /**
     * 獲取CrashHandler實例 ,單例模式
     */
    public static CrashHandler getInstance() {
        if (instance == null)
            instance = new CrashHandler();
        return instance;
    }

    /**
     * 初始化
     */
    public void init(Context context) {
        mContext = context;
        aCache = ACache.get(context);
        //獲取系統默認的UncaughtException處理器
        mDefaultHandler = Thread.getDefaultUncaughtExceptionHandler();
        //設置該CrashHandler爲程序的默認處理器
        Thread.setDefaultUncaughtExceptionHandler(this);
    }

    /**
     * 當UncaughtException發生時會轉入該函數來處理
     */
    @Override
    public void uncaughtException(Thread thread, Throwable ex) {
        if (!handleException(ex) && mDefaultHandler != null) {
            //如果用戶沒有處理則讓系統默認的異常處理器來處理
            mDefaultHandler.uncaughtException(thread, ex);
        } else {
            try {
                Thread.sleep(3000);
            } catch (InterruptedException e) {
//                Log.e(TAG, "error : ", e);
            }
            //退出程序
            android.os.Process.killProcess(android.os.Process.myPid());
            System.exit(1);
        }
    }

    /**
     * 自定義錯誤處理,收集錯誤信息 發送錯誤報告等操作均在此完成.
     *
     * @param ex
     * @return true:如果處理了該異常信息;否則返回false.
     */
    private boolean handleException(Throwable ex) {
        if (ex == null) {
            return false;
        }
        //收集設備參數信息
//        collectDeviceInfo(mContext);
        //使用Toast來顯示異常信息
        new Thread() {
            @Override
            public void run() {
                Looper.prepare();
                Toast.makeText(mContext, "很抱歉,程序出現異常,即將退出.", Toast.LENGTH_SHORT).show();
                Looper.loop();
            }
        }.start();
        //保存日誌文件
        String log = saveCatchInfo2File(ex);
        ACache aCaches = ACache.get(mContext);
        aCaches.put("log", log + "");
        return true;
    }

    /**
     * 收集設備參數信息
     *
     * @param ctx
     */
    public void collectDeviceInfo(Context ctx) {
        try {
            PackageManager pm = ctx.getPackageManager();
            PackageInfo pi = pm.getPackageInfo(ctx.getPackageName(), PackageManager.GET_ACTIVITIES);
            if (pi != null) {
                String versionName = pi.versionName == null ? "null" : pi.versionName;
                String versionCode = pi.versionCode + "";
                infos.put("versionName", versionName);
                infos.put("versionCode", versionCode);
            }
        } catch (PackageManager.NameNotFoundException e) {
//            Log.e(TAG, "an error occured when collect package info", e);
        }
        Field[] fields = Build.class.getDeclaredFields();
        for (Field field : fields) {
            try {
                field.setAccessible(true);
                infos.put(field.getName(), field.get(null).toString());
//                Log.e(TAG, field.getName() + " : " + field.get(null));
            } catch (Exception e) {
//                Log.e(TAG, "an error occured when collect crash info", e);
            }
        }
    }

    /**
     * 保存錯誤信息到文件中
     *
     * @param ex
     * @return 返回文件名稱, 便於將文件傳送到服務器
     */
    private String saveCatchInfo2File(Throwable ex) {
        File file = new File("/mnt/sdcard/crash/");
        if (!file.exists()) {
            file.mkdirs();
        }
        deleteFile(file);
        StringBuffer sb = new StringBuffer();
        for (Map.Entry<String, String> entry : infos.entrySet()) {
            String key = entry.getKey();
            String value = entry.getValue();
            sb.append(key + "=" + value);
        }

        Writer writer = new StringWriter();
        PrintWriter printWriter = new PrintWriter(writer);
        ex.printStackTrace(printWriter);
        Throwable cause = ex.getCause();
        while (cause != null) {
            cause.printStackTrace(printWriter);
            cause = cause.getCause();
        }
        printWriter.close();
        final String result = writer.toString();
        final String time = formatter.format(new Date());
//        Log.e("閃退的log日誌",time+"======"+result);
        sb.append(result);
        try {
            long timestamp = System.currentTimeMillis();
            String fileName = "crash-" + time + "-" + timestamp + ".log";
            if (Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED)) {
                String path = "/mnt/sdcard/crash/";
                File dir = new File(path);
                if (!dir.exists()) {
                    dir.mkdirs();
                }
                FileOutputStream fos = new FileOutputStream(path + fileName);
                fos.write(sb.toString().getBytes());
                //發送給開發人員
//                sendCrashLog2PM(path + fileName);
                fos.close();
            }
            return fileName;
        } catch (Exception e) {
            Log.e(TAG, "an error occured while writing file...", e);
        }
        return null;
    }

    public static void deleteFile(File file) {
        if (file.isDirectory()) {
            File[] files = file.listFiles();
            for (int i = 0; i < files.length; i++) {
                File f = files[i];
                deleteFile(f);
            }
//            file.delete();//如要保留文件夾，只刪除文件，請註釋這行
        } else if (file.exists()) {
            file.delete();
        }
    }

    /**
     * 將捕獲的導致崩潰的錯誤信息發送給開發人員
     * <p/>
     * 目前只將log日誌保存在sdcard 和輸出到LogCat中，並未發送給後臺。
     */
    public static void sendCrashLog2PM(Context context, String fileName) {
//        Log.e("走到這了嗎", "=======================");
        Log.e("file1111111111111111", fileName);
//        Toast.makeText(context, "filename1111111111111111"+fileName, Toast.LENGTH_SHORT).show();
        if ("".equals(fileName)) {
//            Toast.makeText(context, "filename====="+fileName, Toast.LENGTH_SHORT).show();
            Log.e("日誌文件不存在！", "日誌文件不存在！11111111111");
            return;
        }
        fileName = "/mnt/sdcard/crash/" + fileName;
        if (!new File(fileName).exists()) {
//            Toast.makeText(context, "日誌文件不存在！", Toast.LENGTH_SHORT).show();
            Log.e("日誌文件不存在！", "日誌文件不存在！22222222222");
            return;
        }
//        Log.e("走到這了嗎", "111111111111111111111");
        FileInputStream fis = null;
        BufferedReader reader = null;
        String s = null;
        try {
            Log.e("走到這了嗎", "文件名=" + fileName);
            fis = new FileInputStream(fileName);
            reader = new BufferedReader(new InputStreamReader(fis, "GBK"));
            String log = "";
            while (true) {
                s = reader.readLine();
                if (s == null) break;
                log = log + s + "\n";
                // TODO 由於目前尚未確定以何種方式發送，所以先打出log日誌。
                // 可以把s.toString()，在下次啓動app的時候發送到服務端。
//                Log.e("全局捕獲的日誌info", s.toString());
            }
            BugService.Uploadbug(context, log);
        } catch (FileNotFoundException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        } finally {   // 關閉流
            try {
                reader.close();
                fis.close();
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
//        restart();
    }

}
